Review Detail of m_n in So What If I'm a Summoner Who Only Wants Fluffy Creatures?

The concept of the story is pretty interesting, but i dont like the way the MC being nerfed by losing creatures he can summon and the way he get back the creatures in quite convinient way. Next, we have it where low leveled enemies are capable of killing an high level player. I mean what is the point of mentioning the levels if they do not matter. I think this story would be better if the main character being an overpowered character from the start or a story about MMORPG summoner collecting monster (not transported to another world type of story)